|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||In-situ Synchrotron X-ray Diffraction Experiments to Study the Role of Solid-state Thermal Cycling on Microstructure Formation during Metal AM
||Steve Gaudez, Wolfgang Pantleon, Manas V. Upadhyay
|On-Site Speaker (Planned)
During Additive Manufacturing (AM) of metals, the material undergoes rapid solidification just after deposition. Then, until the end of the AM process, it is subjected to Solid-State Thermal Cycling (SSTC). It is important to study the role of SSTC on the microstructure evolution during AM, because the microstructural features determining the materials response such as texture, internal strains, etc., are affected by SSTC. Separating the microstructural changes due to SSTC from those occurring during solidification requires time-resolved investigations. To that end, in-situ synchrotron X-ray diffraction (XRD) and radiography experiments can be very useful. We have developed a novel miniature Laser Metal Deposition (mini-LMD) machine to perform such experiments. Preliminary results of in-situ powder XRD and High-Resolution Reciprocal Space Mapping (HRRSM) experiments are presented elucidating the role of SSTC on the evolution of the polycrystalline grain structure as well as the intragranular microstructure for different printing parameters.
||Additive Manufacturing, Phase Transformations, Iron and Steel